KOVACH, Mary. A review of classical motivation theories: A study understanding the value of locus of control in Higher Education. Journal of Interdisciplinary Studies in Education, [S.l.], v. 7, n. 1, p. 34-53, dec. 2018. ISSN 2166-2681. Available at: <http://isejournal.org/index.php/jise/article/view/213>. Date accessed: 25 may 2019.